var mysql = require('mysql');
var connection = mysql.createConnection({
  host     : 'localhost',
  user     : 'root',
  password : '',
  database : 'douban',
  multipleStatements: true///多条语句查询
});
connection.connect();
module.exports = (sql) =>{
    return new Promise(next =>{
        // connection.connect();
        connection.query(sql, function (error, results, fields) {
           if (error) throw error;
        // console.log('The solution is: ', results[0].solution);
           next(results)
        });
        //  connection.end();
    })

}